1968: Loch Valley and Strathbogie Ranges (Vic). Aerial Spraying of 2,4,5-T begins.

Aerial application of 2,4,5-T begins in Victoria – 1968

In 1968 aerial application of 2,4,5-T approximately three years after planting was introduced to control silver wattle, followed by basal bark spraying or stem injection of the eucalypts with mixtures of 2,4,5-T and picloram (Flinn and Minko 1980. Advances in Control of Woody Weeds in Radiata Pine Plantations in Victoria). Application rate usually 1.1 kg 2,4,5-T in 50 litres of dieseline/ha.

p17 “Aerial spraying of 670 acres of wattle regrowth at Warrenbayne and Loch Valley Plantation with 1 pound active of technical 2,4,5-T Butyl Ester in 5 gallons of distillate (diesel) effectively killed off competing wattle growth . . . p35 Test aerial spraying with 2,4,5-T has been carried out in the Loch Valley Plantation…” Forests Commission 1968-69 Annual Report.